Myanamr Health Research Registration 2024; 36(1-3): 84-89.
DOI:
Residual Effect of Temephos (Abate ® 1SG) for the Control of Dengue Vector Aedes aegypti Larvae
Than Myat Soe, Nwe Nwe Kyaw, Myint Myint Aye, Phyo Mon Oo, Myo Thant, Nay Chi Htet Htet Lin Aung, Nay Yi Yi Lin & Moh Moh Htun
Myanmar Health Sciences Research Journal, 2024; 36(1-3): 84-89
ABSTRACTTemephos that contained in the group of organophosphate insecticide is the larvicide which is well known as Abate in Myanmar. Although Abate has been widely used in Myanmar for more than a decade to control dengue vector Aedes mosquitoes, residual effect of Abate in water containers has not been reported in Myanmar. Thus, the aim of the present study was to evaluate the residual effect of temephos (Abate ® SG) for the control of dengue vector Aedes aegypti larvae. Laboratory based experimental study design was conducted from June to December, 0. Field and laboratory strains of Ae. aegypti larvae were used in the test. The field strain larvae were collected from potential breeding sites of Aedes mosquito in Sit Kone Village, Hinthada Township. For laboratory strain, the colony was maintained for F0 generation in the laboratory and not exposed to any control agents.
RESULT
INTRODUCTION
DHF annually., 3 In 970, Myanmar has reported the first dengue outbreak with
654 cases and 9 deaths in Yangon.
Dengue virus is mainly transmitted by the primary vector: Aedes aegypti that closely associated with human habitats. In tropical, subtropical and temperate regions of the world, dengue fever (DF) and dengue haemorrhagic fever (DHF) are considered the most important problem in public health and millions of people are infected by DF and DHF annually., 3 In 970, Myanmar has reported the first dengue outbreak with 654 cases and 9 deaths in Yangon.
SUPPLEMENTARY MATERIAL
The present study was carried out with experimental laboratory based study design and conducted from June to December, 0. To collect the sample from field, Sit Kone Village in Hinthada Township was selected as the study area that was based on the current year dengue fever case reports.
DISCUSSION
The measurement of effective vector control is critical to achieving and sustaining the reduction of morbidity to dengue. The aim of preventive and vector control interventions
is to reduce dengue transmission, thereby decreasing the incidence of the infection and preventing outbreaks of the disease.3
In the present study, good residual effect of Abate was defined at the ≥90% larval mortality rate. The residual effect of Abate (temephos % sand granules) was described by different utilization patterns. In field strain of Ae. aegypti larvae, the residual effect (≥90% mortality) was found within 4 weeks in the tying with muslin cloth as longest duration, and followed by plastic packet and no packet utilization patterns. For laboratory strain of Ae. aegypti larvae, the longest time of mortality rate from 90% to 00% was similarly observed in muslin cloth utilization pattern until 7 weeks, and followed by plastic packet and no packet utilization patterns.
ACKNOWLEDGMENT
The authors are grateful to Director General from Department of Medical Research, Ministry of Health for the encouragement and support on the research. We wish to thank the staff of Vector Borne Disease Control (VBDC) Unit in Hinthada Township, Ayeyarwady Region for their collaboration
in the study.
CONFLICT OF INTEREST
1. Phuanukoonnona S, Boughb M & Bryanc JH. Household practices of temephos use for dengue larval control, Khon Kaen province, north-east Thailand. Dengue Bulletin 006; 30: 5-59. 2. Jacobs M. Dengue: Emergence as a global public health problem and prospects for control. Transactions of the Royal Society of Tropical Medicine and Hygiene 000; 94(): 7-8. 3. Chen CD & Lee HL. Laboratory bioefficacy of CREEK .0G (temephos) against Aedes (Stegomyia) aegypti (Linnaeus) larvae. Tropical Biomedicine 006; 3(): 0-3.